724971 has 16 divisors (see below), whose sum is σ = 1078560. Its totient is φ = 430080.

The previous prime is 724967. The next prime is 724991. The reversal of 724971 is 179427.

It is not a de Polignac number, because 724971 - 2² = 724967 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 724971.

It is not an unprimeable number, because it can be changed into a prime (724901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 811 + ... + 1451.

It is an arithmetic number, because the mean of its divisors is an integer number (67410).

2⁷²⁴⁹⁷¹ is an apocalyptic number.

724971 is a deficient number, since it is larger than the sum of its proper divisors (353589).

724971 is a wasteful number, since it uses less digits than its factorization.

724971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686.

The product of its digits is 3528, while the sum is 30.

The square root of 724971 is about 851.4522887397. The cubic root of 724971 is about 89.8338911400.

The spelling of 724971 in words is "seven hundred twenty-four thousand, nine hundred seventy-one".